CLARIFICATION GUIDEOF THE UCI TECHNICAL REGULATION
01.01.2023 version
As the summit organization of world cycle sport, the International Cycling Union (UCI) is theguarantor of the proper application of ethical and sporting regulations.
The UCI Regulations assert the primacy of man over machine. Observance of the regulations
by all parties involved facilitates sporting fairness and safety during competition.
This document does not replace Articles 1.3.001 to 1.3.034 of the UCI Regulations, butrather complements them and illustrates the technical rules defined therein. The objectiveof this document is to offer a definitive interpretation in order to facilitate understanding
and application of the Regulations by international commissaires, teams and manufacturers.
This practical guide applies to equipment used in road, track and cyclo-cross events. Eachdiscipline has its own technical characteristics and each may have variants depending on thetype of event.
The UCI Equipment Unit may be contacted by anyone seeking information on the technicalregulations. The technical regulations can be consulted on the UCI website under the "Rules"
heading. Further details on the approval procedures for frames, forks and wheels are alsoavailable on the UCI website under the "Equipment" heading.
DEFINITIONS
B
•
•
•
•

•

BAR END PLUGS – a handlebar accessory that exclusively covers open ends of thehandlebar / extensions / base bar.
BASE BAR – a steering assembly with a grip position allowing for an aerodynamic
posture.
BESPOKE EQUIPMENT – any product that belongs to a brand and a model range andoffers customisation features around the adaptation of the equipment.
BICYCLE - a vehicle with two wheels of equal diameter. The front wheel shall besteerable; the rear wheel shall be driven through a system comprising pedals and achain. Exceptions to this rule may exist for certain cycling disciplines, in which casespecific rules are provided for in the respective discipline.
BOTTLE CAGE – an add-on accessory used to affix a water bottle to a bicycle.

E•

EQUIPMENT – any product a rider will use in the UCI sanctioned event including but
not limited to clothing, safety equipment and bicycles.

F
FOREARM SUPPORT – a component of the fixed additional time trial extension
handlebar that provides an additional point of support.

1

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
H
•

•

•
•

HANDLEBAR COCKPIT – a combination of the handlebars or the base bar with thefixed additional time trial extension handlebar, stem plus any accessories (controls,
levers, etc. and all their mounting accessories).
FIXED ADDITIONAL TIME TRIAL EXTENSION HANDLEBAR – a steering assembly
secured to the handlebar or the base bar to improve the rider’s aerodynamic
posture.
HANDLEBAR GRIP – an accessory designed to provide padding and vibration
damping to ensure a proper grip between the hands and the handlebars.
CYCLING COMPUTER MOUNT – an accessory that is designed solely for the secure
installation of a cycling computer.

M•

MAXIMUM / MINIMUM DIMENSION OF THE CROSS SECTION - the largest andsmallest dimensions of tube sections respectively, i.e. the maximum and minimum
dimensions authorised in any direction.

R•

RECTANGULAR BOX: The sides of the box are named as follows:•

REFERENCE PLANE - a nominally horizontal plane.

S•

STEM - a component on a bicycle that connects the handlebars to the steerer tubeof the bicycle fork.

T•

TRADITIONAL HANDLEBARS (commonly referred to as a Drop Handlebars) - a
steering assembly with multiple grip positions allowing for an aerodynamic posture.
The handles of the traditional handlebars are bent below the rest of the bar.

2

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Section 1 : general provisions§ 1 Principles
ARTICLE 1.3.001“Each licence holder shall ensure that his equipment (bicycle with accessories and otherdevices fitted, headgear, clothing, etc.) does not, by virtue of its quality, materials or design,
constitute any danger to himself or to others.
The licence holder is responsible for his or her equipment and for ensuring its compliancewith the regulations. The licence holder must thus have knowledge of the technicalregulations to be able to apply them to the bicycle, accessories and clothing. The objectiveof the approval procedures put in place by the UCI is to assist licence holders in this task.
The bicycle must be designed and constructed to the highest professional standards inaccordance with official quality and safety standards in a manner that respects the UCI'stechnical regulations, allowing the rider to adopt, without difficulty or risk, the required
positions (support points, withdrawn saddle position, hands on the handlebars, position ofhandlebar extensions, etc.).

ARTICLE 1.3.001 BIS“Each licence holder shall ensure that the equipment he uses on the occasion of road, trackor cyclo-cross events shall be approved by the UCI according to the specifications of theApproval Protocols in force and available on the UCI Website.”
The UCI put at disposal on the UCI website the list of homologated Road, Time-Trial, Cyclocross, Track framesets (frame, fork, seat post and the frame components between the headtube and the handlebar stem) as well as the Cyclo-cross and road wheels under the"Equipment" heading. For any item of equipment that is subject to an approval procedure to
be used in competition, it must be approved in advance by the UCI with details published on
the website. The other material items don’t need to be homologated but must respect
article 1.3.006 obligations.

ARTICLE 1.3.002“The UCI shall not be liable for any consequences deriving from the choice of the equipmentused by licence holders, nor for any defects it may have or its non-compliance. Equipmentused must meet all relevant ISO quality and safety requirements for bicycles (as referenced
for illustration purposes in the Clarification Guide published on the UCI website) as well as
any other standards applicable in the country of the event.”“The licence-holder shall use the equipment which is certified and compliant with quality andsafety standards as provided by the manufacturer, without any modification whatsoever. The
licence-holder shall be entirely and exclusively liable for any modification made to theequipment, in particular in the event of an incident, and may be subject to disciplinary
sanctions in accordance with the UCI Regulations.”3

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
Updated on 01.01.19
It is essential that the equipment used in competition meets the prevailing quality and safety
standards for bicycles. Mechanics and riders should also be aware of the ISO 4210 Standard
on safety that applies to cycling equipment. They should refer to this Standard before
modifying or adjusting any bicycle component. From 2019, all the framesets submitted to
the UCI for approval will have to join a certification confirming the compliance with the ISO
4210 security norm. The certification template is available in the section « Equipment » ofthe UCI website.
Modifying equipment used in competition in relation to products supplied by the
manufacturer is prohibited for obvious safety reasons. Whether it is a matter of modifying
the length of the saddle, adapting approved wheels, filing off fork drop-out safety lugs or
meeting the 3:1 rule by adding tape to handlebars. No modification of equipment that is notconducted by the manufacturer is authorized by the UCI without prior approval.

Figure 1: Examples of the prohibited modification of equipment (addition of tape, filing off
fork drop-out safety lugs)

Figure 2: Example of the prohibited modification of equipment (the carbon cover added tothe chainring
The addition of handlebar tape to improve a rider's grip and any addition of adhesive tape tomaintain, avoid abrasion, provide visual continuity or any other function is authorized in
condition when it does not constitute an excrescence or enlarges the general shape ofequipment.

4

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 3: Example of application the adhesive tape on the Time Trial disc wheel

Figure 4: Illustration of the addition of the adhesive tape to cover bolts access

ARTICLE 1.3.003“In no event shall the fact that a rider has been able to take part in the competition give rise
to liability on the part of the UCI; checks on equipment that may be carried out by thecommissaires or by an agent or a body of the UCI being limited to compliance with purely
sporting and technical requirements. Where required, checks on equipment and material
may be carried out, before, during or after the race, at the request of the president of thecommissaires’ panel, or that of an agent or body of the UCI.
For that purpose, the commissaire and the UCI can seize equipment for a subsequent check,if necessary before, during or after the race, irrespective of whether the equipment was usedduring the competition.
If the seized equipment is found not to comply with the requirements of the UCI Regulations,the UCI may retain such item of equipment until the conclusion of any related disciplinary
proceedings.”
5

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONARTICLE 1.3.003 BIS“Evading, refusing or failing to allow or enable a commissaire or other competent body to
conduct an equipment check shall be sanctioned as follows:
Rider or other team member: suspension of between one month and one year and/or a fineof between CHF 1’000.- and CHF 100’000.Team: suspension of between one and six months and/or a fine between CHF 5’000 and CHF
100’000”§ 2 Technical innovations
ARTICLE 1.3.004“Except in mountain bike racing, no technical innovation regarding anything used, worn or
carried by any rider or license holder during a competition (bicycles, equipment mounted onthem, accessories, helmets, clothing, means of communication telemetry, device, sensors,etc.) may be used until approved by the UCI. Requests for approval shall be submitted to theUCI, accompanied by all necessary documentation.
All associated examination costs are to be paid by the applicant and are determined by the
UCI Management Committee according to the complexity of the submitted technicalinnovation.
The UCI will study the application of the technical innovation from a sporting and technicalpoint of view and respond within 6 months from the date of submission of a complete file,including the application, all relevant exhibits and any additional documents requested by
the UCI. The innovation comes into force as from the acceptance date.
There is no technical innovation in the sense of the present article if the innovation entirely
falls within the specifications foreseen in the regulations.”
Technical innovations must be submitted to the UCI in advance and approved by the
Equipment Commission before they can be used in competition.
A technical innovation is defined as a new system, device or item of equipment that allows
an improvement of a rider’s performance, adds new functions to the bicycle, modifies thebicycle’s general appearance or affects any other aspect of the UCI regulations.
If there is any doubt, it is preferable to present new equipment to the UCI which will
determine whether it is a matter of a technical innovation or not. New equipment will becarefully studied by experts in order to evaluate the benefits and how such equipment could
improve cycle sport as well as assessing the risks and any potential divergence from theregulations. The most appropriate decision will then be taken in the interest of the sport.

6

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONARTICLE 1.3.005“If at the start of a competition or stage the commissaires' panel considers that a rider
arrives with a technical innovation or an equipment not yet accepted by the UCI, it shallrefuse to permit the rider to start with such an innovation.
In the event of use in competition, the rider shall automatically be expelled from thecompetition or disqualified. There shall be no right to appeal against the decision of thecommissaire's panel.
If this technical innovation or the equipment not yet accepted by the UCI are not noticed or
sanctioned by the commissaire's panel, the UCI disciplinary commission shall order thedisqualification. The UCI shall refer to the disciplinary commission, either automatically or at
the request of all interested. The disciplinary commission will only apply sanctions after
having received the opinion of the equipment commission.
In out of competition situations, the UCI shall decide whether an item should be considered atechnical innovation and whether the procedure provided for in article 1.3.004 is to befollowed.”
There are 3 different possibilities to sanction the use of a technical innovation incompetition that was not approved by the UCI first:• In cases where the technical innovation is checked before the start of a race, the rider is
not allowed to start the race unless he removes or replaces the concerned equipment.
• In cases where the technical innovation is spotted during the race, the rider is
automatically expelled from the competition or disqualified.
• In cases where the technical innovation is not sanctioned by the commissaire's panel
neither before the start, nor during the race, the disqualification may be decided
afterward by the UCI disciplinary commission.
During the events, the commissaire's panel make the decision to determine if an equipment
meets the technical innovation's definition and which sanction to apply. In out ofcompetition situations or when a technical innovation is reported after the end of an event,the UCI disciplinary commission make the decision if a technical innovation was used andwhat would be the sanction that applies.

§ 3 Commercialisation
ARTICLE 1.3.006“Equipment shall be of a type that is sold for use by anyone practicing cycling as a sport.
Any equipment in development phase and not yet available for sale (prototype) must be
subject of an authorization request to the UCI Equipment Unit before its use. Authorization
will be granted only for equipment which is in the final stage of development and for which
commercialization will take place no later than 12 months after the first use in competition.
The manufacturer may request a single prolongation of the prototype status if justified byrelevant reasons.

7

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
When assessing a request for use of equipment which is not yet available for sale, the UCI
Equipment Unit will pay particular attention to safety of the equipment which will be
submitted to it for authorization.
The use of equipment designed especially for the attainment of a particular performance(record or other) shall be not authorised.
Upon expiry of the authorized period of use of a prototype (equipment not yet available forsale), any item of equipment must be commercially available in order to be used in cycling
events. The requirement of commercial availability shall be understood as equipment having
to be available through a publicly available order system (whether with manufacturer,
distributor or retailer). Upon an order being placed, the order shall be confirmed within 30
days and the relevant equipment shall be made available for delivery within a further 90-day
deadline. In addition, the retail price of the equipment shall be publicly advertised, shall not
render the equipment de facto unavailable to the general public and shall not unreasonably
exceed the market value for equipment of a similar standard.

Any equipment which is not commercially available and is not authorised (not authorised by
UCI Equipment Unit or authorised period expired), may not be used in cycling events
governed by the UCI Regulations. Any such unauthorised use of equipment may besanctioned by disqualification of results obtained when using the equipment and/or a fineranging from CHF 5’000 to 100’000.”
Text modified on 15.10.18
The entire used material must be accessible to all participants. All the components must be
available commercially (i.e. available on the market or sold directly by the manufacturer) at
the latest twelve months after their first use in competition. If such a deadline is requested
and accepted by the UCI, the manufacturer must publicly announce that the product inquestion is being used in competition and when it will be available for sale. In all cases the
product must be in a final stage of development, very similar to the product that will bemarketed.
Thus, it is not allowed to use equipment in competition that is not either available on themarket or authorized by the UCI Equipment Unit and previously communicated by the
manufacturer (with a twelve months period for the marketing).
The use of equipment specially designed for a particular athlete, event or performance areprohibited. "Specially designed" means a bicycle with a technical added value whencompared with other equipment.
No minimum production quantity or minimum price is defined for either bicycles or any
component parts.
It is also demanded to have reasonable prizes, meaning comparable to a similar product of asame range.

8

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION§ 4 Onboard technology
ARTICLE 1.3.006 BIS“Onboard technology devices, which capture or transmit data, may be fitted on bicycles orworn by riders subject to being authorised under the present article, without prejudice toother provisions of the UCI Regulations. The present article concerns any device which
captures or transmits data as described below, including but not limited to sensors (worn oringested), transponders, rider information systems, telemetry devices.
1. Devices which capture or transmit the following types of data are authorised:- Positioning: information related to the location of the rider or the bicycle;- Image: still or moving images or footage captured from the bicycle (such devices
may only be fitted on the bicycle unless specific regulations of a given discipline authorise
devices being worn by riders);- Mechanical: information captured from the bicycle or any of its components,
including but not limited to power, speed, cadence, accelerometer, gyroscope, gearing, tyrepressure.
2. Devices which capture or transmit the following physiological data are authorised:heartrate, body temperature, sweat rate. The authorisation is, however, limited totransmission protocols which enable only the rider concerned to view the data
during a competition.
3. Devices which capture other physiological data, including any metabolic values
such as but not limited to glucose or lactate are not authorised in competition.
The authorised capturing and transmitting of data as provided under this article shall not
enable a rider to view data of another rider. Likewise, teams shall only access data of theirriders, where such transmission is authorised, unless information pertaining to riders of otherteams is publicly available.
Any onboard technology device fitted on a bicycle must:••

Be installed on a system designed for bicycles and not affect the certification of any itemof the bicycle;
Not cause a risk for the safety of any rider and, therefore, be affixed in a manner that
ensures it is not susceptible of inadvertently dismounting or is non-removable.

The UCI may grant derogations to any envisaged use of onboard technology which is not
authorised by the present article. Derogation requests shall be assessed, inter alia, inconsideration of criteria of equal access to equipment, sporting fairness and integrity, andshall also comply with articles 1.3.001 to 1.3.006. Derogations may be limited to specific
events and riders or teams.
The UCI shall not be liable for any consequences deriving from the installation and use of
onboard technology equipment by licence holders, nor for any defects it may hold or its noncompliance.

9CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
For the sake of clarity, the present article does not govern or affect the ownership of thevarious data, meaning that the capturing, use and/or exploitation of the data remains
subject to consent of the relevant rights’ holder.”(Article introduced on 10.06.21)

This article defines the terms of the onboard technology equipment which has the ability tocollect or transmit data, information or images on the bicycles (transponder, camera, gps,
telemetry system...).
Such equipment is not considered as technological innovations in the sense of the article
1.3.004.
Moreover, as these equipment must be non-removable, they are considered as an integral
part of the weight of the bicycle, as defined in the article 1.3.019. They will be left on thebicycle during a minimum bicycle weight check done by the Commissaires.

Section 2 : bicycles§ 1 Principles
ARTICLE 1.3.007“The bicycle is a vehicle with two wheels of equal diameter. The front wheel shall besteerable; the rear wheel shall be driven through a system comprising pedals and a chain.
Exceptions to this rule may exist for certain cycling disciplines, in which case specific rules areprovided for in the respective discipline.”
Text modified on 01.01.19
The bicycle is a vehicle with two wheels which must be of equal diameter. Exception for MTB
where the two wheels can be of a different diameter.
The front wheel is steerable; the rear wheel is driven. The bicycle is propelled solely by asystem of pedals acting upon a chain. Only one chain may be used on the bicycle in order toengage the transmission between the bottom bracket and the driven wheel.
The bicycle must be in "working order" with a steering system acting on the steerable wheel
and a propulsion system acting on the driven wheel by means of a circular movement
through a chainset comprising one or more chainwheels and two arms (cranks), arranged at
180°, one as an extension of the other, in the same plane.

ARTICLE 1.3.008“The rider shall normally assume a sitting position on the bicycle. This position requires thatthe only points of support are the following: the feet on the pedals, the hands on thehandlebars and the seat on the saddle.”
The use of a supplementary point of support such as a lumbar support achieved by anexcessive inclination of the saddle or the addition of a lumbar support component to thesaddle is not authorized in order to ensure fairness in competition.
10

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONARTICLE 1.3.009“The bicycle should have handlebars which allow it to be ridden and maneuvered in any
circumstances and in complete safety.”
Bicycles used in road and cyclo-cross events must be fitted with an efficient braking systemthat acts on both wheels (either simultaneously or independently) operated by two brakelevers. The use of a fixed gear in competition is prohibited. Bicycles shall have at least 89 mm
clearance between the pedal spindle and the front tire when turned to any position inaccordance with the requirements of the EN14781 safety standard to not be hindered whenturning.
Hydraulic brake systems on rims are authorized provided that their attachment to thebicycle does not contravene any regulations (brake hoods must not become extensions,etc.). Disc brake systems are authorized.

ARTICLE 1.3.010“The bicycle shall be propelled solely, through a chainset, by the legs (inferior muscular
chain) moving in a circular movement, without electric or other assistance.”
Exceptions to this rule may exist for certain cycling disciplines, in which case specific rules areprovided for in the respective discipline.
In para-cycling, mechanical prostheses/orthopedic braces for upper or lower limbs can only
be used by athletes who have been evaluated in accordance with the UCI classification
procedure and who have Review (R) or Confirmed (C) status.
In no case may a mechanical prosthesis/orthopedic brace for the lower limbs be usedoutside para-cycling events.”
Text modified on 01.01.19

The movement of the pedal axle around the bottom bracket axle must be completely
circular. Oval chainwheels are allowed if the path is circular with a crank arm geometry that
does not change.
The addition of mechanical or electrical systems that serve to assist the rider is prohibited.
Exception for the E-MTB discipline. The use of an electronic unit solely to change gears is
authorized provided that the attachment to the bicycle does not contravene any regulations.
All athletes, disabled or able-bodied, wanting to wear prosthesis or orthopaedic braces
should go through the classification procedure. Able-bodied athletes cannot the use
mechanical prostheses/orthopaedic braces because they would have NE (Not Eligible) statusaccording to the classification procedure.
Mechanical prosthesis/orthopaedic braces for lower limbs are prohibited in able-bodied
events. On the other hand, mechanical prostheses/orthopaedic braces for upper limbs will
be authorised (after evaluation) if they allow an improvement in handling skills compared toa fixed prosthesis/orthopaedic brace. An athlete with a mechanical prosthesis/orthopaedic
11

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
brace for upper limbs can thus take part in able-bodied competition upon receiving
authorization from the integration procedure.

§ 2 Technical specifications
ARTICLE 1.3.011“Except where stated to the contrary, the technical specifications given in the articles 1.3.011
to 1.3.025 shall apply to bicycles used in road, track and cyclo-cross racing.
The specific characteristics of bicycles used in mountain bike, BMX, BMX Freestyle, trials,
indoor cycling and paracycling for riders with disabilities are set out in the part regulating thediscipline in question.”

Figure 5: Illustration of the parts of the bicycle covered by Articles 1.3.011 to 1.3.025

ARTICLE 1.3.012“A bicycle shall not measure more that 185 cm in length and 50 cm in width overall.
A tandem shall not measure more than 270 cm in length and 50 cm in width overall.”
The maximum width of 500 mm for the bicycle directly relates the maximum authorised
overall width (outside – outside) of handlebars. The minimum overall width (outside –outside) of traditional handlebars (road events) and base bars (road and track events) islimited to 350 mm.

12CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONARTICLE 1.3.013“The peak tip of the saddle shall be a minimum of 50 mm to the rear of a vertical planepassing through the bottom bracket spindle.
The peak tip of the saddle can be moved forward until the vertical line passing through thebottom bracket spindle where necessary for morphological reasons as a part of an
exemption. By morphological reasons should be understood everything to do with the sizeand limb length of the rider.
Any rider who, for these reasons, considers theat he needs to use a bicycle of lesser
dimensions than those given shall inform the commissaires' panel to that effect at the timeof the bike check.
Only one (1) of the following two (2) exemptions for morphological reasons can be requestedby the rider and thereafter granted;
1.
Either the peak tip of the saddle can be moved forward to a value distance equal toor less than 50 mm.
2.
Or tThe fixed time trial extensions handlebar can be adapted moved forward, in
accordance with the rider height categories defined in Article 1.3.023.”
The withdrawn position of the saddle is measured from the tip of the saddle to the verticalplane passing through the center of the bottom bracket axle.
Any rider who considers, for morphological reasons, that he or she cannot respect theregulations concerning the withdrawn position of the saddle may obtain an exemption fromthe commissaire at the time of the bike check. In no case the peak of the saddle can exceed
the vertical line passing through the bottom bracket spindle
If the exemption for the saddle is used, the rider cannot use the exemption for theextensions length in accordance with Article 1.3.023

13CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONARTICLE 1.3.014“The plane passing through the highest points at the front and rear of the saddle can have amaximum angle of nine degrees from horizontal. The length of the saddle shall be 24 cm
minimum and 30 cm maximum. A tolerance of 5mm is allowed.”
It is important to grant the rider sufficient freedom to allow a comfortable position to be
adopted, reducing the pressure on the perineum, while avoiding any deviation through anexcessively sloping saddle that could improve sporting performance to an unacceptable
degree by the addition of a lumbar support. Furthermore, if the saddle is inclined too
severely, this reduces the quality of the rider’s position on the saddle, thus reducing its
intrinsic function of providing a basic support for the rider on the bicycle.
Checks on the horizontality of saddles are conducted in the road, track and cyclo-crossevents by measuring the angle of incline of the saddle, considering the plane passing
through the highest points at the front and rear of the saddle. This angle must be less than 9degrees (positive or negative incline).
The commissaries are provided with ameasuring device as shown in the Figure
6. Checks will not be systematic, but inthe event of any doubt, the commissaires
will place the device on the saddle todetermine its angle of incline after having
calibrated the device to the ground or themeasuring jig.

Figure 6: Official measuring device tocheck saddle inclination
14

The measurement of the horizontality of saddles must be a simple, fair and repeatableprocess. The tolerance of 9 degrees gives the rider a lot of freedom to adjust his or her
position on the bike. Commissaires are able to give a clear, coherent and categoricalresponse when carrying out saddle checks.

ARTICLE 1.3.015“The distance between the bottom bracket spindle and the ground shall be between 24 cm
minimum and maximum 30 cm.”
The aim of this rule, among other things, is to avoid the risk of the cranks or pedals touching
the ground when cornering.

ARTICLE 1.3.016“The distance between the vertical passing through the bottom bracket spindle and the front
wheel spindle shall be between 54 cm minimum and 65 cm maximum.
The distance between the vertical passing through the bottom bracket spindle and the rear
wheel spindle shall be between 35 cm minimum and maximum 50 cm.”
If the front or rear center is too short, this will reduce the bicycle's stability whereas if thefront or rear center is too long the bicycle will be less manoeuvrable.

Figure 7: Illustration of the minimum and maximum distances between the bottom bracket
and front and rear wheel axles

ARTICLE 1.3.017“The distance between the internal extremities of the front forks shall not exceed 11.5 cm;
the distance between the internal extremities of the rear triangle shall not exceed 14.5 cm.”15

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 8: Illustration of the maximum distances between the fork drop-outs and rear dropouts

ARTICLE 1.3.018“Wheels of the bicycle may vary in diameter between 70 cm maximum and 55 cm minimum,
including the tyre. For the cyclo-cross bicycle the width of the tyre (measured between thewidest parts) shall not exceed 33 mm and it may not incorporate any form of spike or stud.
For massed start competitions in the disciplines road and cyclo-cross, only wheel designs
granted prior approval by the UCI may be used. Wheels shall have at least 12 spokes; spokes
can be round, flattened or oval, as far as no dimension of their sections exceeds 10 mm.
In order to be granted approval wheels must have been subjected to the Vertical Drop Test
which consists of :Test method : Vertical Drop Test
Vertical drop test (neutralization of the rebound of the anvil)
Energy level :40 Joules
Impact striker geometry :Flat steel anvil, the impact surface is covered with a silicone rubber pad of 20mm thickness(Hardness Shore A=50 +/- 5, Compression set of 40% acc. To ASTM D395 Method B). The
rubber pad requires to be undamaged.
Impact mass :Range of 6 – 10 kg
Energy must always remain at 40 Joules at the hit with a +/- 5% tolerance.
Hitting point :16

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
One hit at 90° from valve hole, adjusted to have the impact point of anvil between the spokes
In order to be certified as passed, the alloy and/or carbon wheels shall have
- No visible cracks or delamination- No change in lateral profile or in lateral run out in excess of 1.0mm- No change in radial profile or in radial run out in excess of 1.0mm
Wheels which meet the definition of traditional wheels do not need to be certified.
Definition of Traditional wheels :Criteria :Rim height: less than 25 mm
Rim material: alloy
Spokes: minimum of 20 steel spokes which are detachable and all components must be
identifiable and commercially available
In track competition, including motor-pacing the use of a front disc wheel is only permitted in
the specialties against the clock
Notwithstanding this article, the choice and use of wheels remains subject to articles 1.3.001
to 1.3.003.”
This regulation applies to road races and cyclo-cross. There is a distinction between standard
and non-standard wheels. The latter must pass a vertical drop test using a specific procedurein order to be included in the list of wheels authorized for competition. This document
entitled "List of Approved Wheels” and further detailed information on the test procedure
for non-standard wheels are available on the UCI website under the "Equipment" heading.
The procedure does not apply to time trials on the road or track events.
The list of approved wheels under the previous procedure, in force until the 31 December
2015, is also available on the UCI website under the “Equipment” heading. The wheels
included in this list are still allowed in competition.
For the individual sprint, the front disc wheel is allowed for the qualifications (200m flying
start) but not for the matches.

ARTICLE 1.3.019“The weight of the bicycle cannot be less than 6.8 kilograms.”
The minimum weight of the bicycle (inworking order) is 6.800 kg, considered
without on-board accessories in place,that is to say those items that may beremoved during the event. The bottles,
on-board computers and all others
removable accessories must be removed
during the weight check. However, thebottle cages, fixture systems and clippedon extensions are part of the bicycle andstay in place during the weighing.

Figure 9: Measuring the weight of abicycle17

18

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONARTICLE 1.3.020
TRIANGULAR SHAPE“For road, track, and for cyclo-cross competitions, the frame of the bicycle shall be of a
traditional pattern, i.e. built around a main triangle.”
The triangular shape is defined from a design using 8 cm-wide boxes for each tube. In order
to comply with this rule, the nominal rear wheel axle must be located within the seat stayand chain stay boxes. Furthermore, the bottom bracket axle must be located inside the chain
stay, seat tube and down tube boxes. The drawing below illustrates these conditions.

Figure 10: Illustration of the bottom bracket and rear wheel axles inside the correspondingboxes
This rule results from the Lugano Charter and has the objective of preserving the culture andimage of the bicycle as an historical fact. Among other things, it prevents the use of "girder"
frames and bicycles with extravagant shapes that do not represent bicycles as understood by
the UCI and which would change the existing disciplines.

18

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 11: Example geometry of a bicycle that does not comply with UCI regulations

COMPENSATION TRIANGLES AND THE 16CM REINFORCEMENT ZONE
“Isosceles compensation triangles with two 8 cm sides are authorized at the joints between
frame elements except at the joints between the chain stays and seat stays where triangles
are not authorized.
The effective width of the head tube zone may not exceed 16 cm at the narrowest point
between the inner join of the top tube and down tube and the front of the box for the headtube.”
Authorized reinforcement triangles are shown in blue in the diagram below. A 16 cm
reinforcement zone is defined for the section where the top tube, head tube and down tube
connect.
The frame can completely fill the areas (rectangular boxes, compensation triangles and the
16 cm reinforcement zone), but in no case cross these limits.

19

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 12: General illustration of compensation triangles and boxes
Reinforcement triangles with 8 cm sides are authorized at the joints between the tubes inorder to accommodate the stresses relating to the specific properties of composites which
require broader curves than metal to distribute and transmit forces through the frame
without creating stress concentration zones that would make the frame more dangerous touse.
The 16 centimeters rule has been introduced to guarantee improved aerodynamic fairness incompetition between taller and shorter riders and in order to allow manufacturers enoughroom for maneuver so that they can create a design which is consistent between different
frame sizes while allowing an adequate level of rigidity to guarantee safety in this sensitive
area of the frame.
To illustrate this amendment to the UCI technical regulations, a series of drawings will allow
all the possible situations to be clarified.
First, in the case of small frame sizes, even if the frame fits entirely within the boxes (shown
Figure 13), the distance between the front of the box for the head tube and the internal joint
between the top tube and the down tube at the nearest point to the head tube must notexceed 16 cm.
In this specific instance, there is no compensatory joint zone that can be added to the boxes
behind the head tube, since, as its name indicates, there is no scope for compensation, given
how far forward the frame is. On the contrary, the 16 cm must be respected even inside theboxes as illustrated in the drawings below.

20

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 13: Illustration of the 16cm ruleFigure 14: Illustration of the maximum
distance of 16 cm for a small frame size
(A)

Figure 15: Illustration of the maximum
distance of 16 cm for a small frame size
(B)

The limit case where the 16 cm corresponds exactly to the intersection of the boxes for the
top and down tubes is shown in the Figure 16. In this configuration, no compensatory joint
zone can be added to the boxes behind the head tube.

21

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 16: Illustration of the limit case
Lastly, for average and large frame sizes, the compensatory triangle behind the head tube is
replaced by a compensatory joint zone of 16 cm. This zone is constructed by tracing a line
parallel to and 16 cm behind of the line of the front of the box for the head tube, between
the boxes for the top and down tubes, as shown in the Figure 17.
The compensatory joint zone thus makes it possible to design a more homogeneoustransition between the top tube and the down tube while permitting a better choice of the
tube size for larger frames. Thus, the aerodynamic advantage of small frames disappears
while at the same time avoiding taller riders making use of small frames to obtain thisbenefit.

Figure 17: Illustration of the compensatory joint zone

22

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONSTRAIGHT LINES“It shall be constructed of straight or tapered tubular elements (which may be round, oval,
flattened, teardrop shaped or otherwise in cross-section) such that the form of each element
except the chain stays and the seat stays encloses a straight line.”
The frame tubes must be tubular without excessive curvature. The frame elements may beslightly curved, but a straight line must be able to be drawn within each element along its
length. The start and finish points of each of these lines is shown on the diagram below.

Figure 18: Illustration of the start and finish points of the straight lines required inside tubes
The start and finish points of the lines inside frame elements are the following:•

Top tube: from the intersection of the front of the seat tube box with the top tube
to the intersection of the rear of the head tube box with the top tube.

•

Head tube: from the section through the top of the head tube to the lower section
taken at the point of contact with the forks.

•

Down tube: from the center of the bottom bracket to the intersection of the rear of
the head tube box with the down tube.

•

Seat tube: from the center of the bottom bracket to the section passing through the
top of the seat tube.

In the case of double tubes, the straight line must fall within the envelope encompassing
both tubes. In this case, it is not obligatory to be able to insert a straight line within eachtube separately.
It is not necessary for a straight line to pass inside the chain stays, seat stays, and fork
blades.
THE SHAPE OF TUBES“The elements of the frame shall be laid out such that the joining points shall follow thefollowing pattern: the top tube (1) connects the top of the head tube (2) to the top of the23

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
seat tube (4); the seat tube shall connect to the bottom bracket shell; the down tube (3) shallconnect the bottom bracket shell to the bottom of the head tube. The rear triangles shall beformed by the chain stays (6), the seat stays (5) and the seat tube (4) with the seat stays
anchored to the seat tube at points falling within the limits laid down for the slope of the top
tube. The seat post shall comply with the dimensional restrictions that apply to the seat tube
and may be attached to the frame anywhere on the seat tube and/or top tube. Additionalframe components can be added between the head tube and the handlebar stem. These
must be inside the dimension of the head tube box.”
The frameset must be able to fit entirely within the template formed by nine rectangularboxes of 80 mm width, the 16 cm reinforcement zone and the compensation triangles asshown by the diagram below. The seat post (8) must be able to fit entirely within its own
rectangular box of 80 mm width. The upper line of the box must pass at most 60 mm fromthe fixture of the saddle on the seat post, Figure 20. Additional frame components between
the head tube and the handlebar stem which are not covered by the head tube box and/or
the top tube box must be able to fit within their own rectangular component box (9) of
80mm width. Altogether, the additional frame components between the head tube and thehandlebar stem cannot exceed dimensional restrictions of the head tube box. During thetransition stage, this restriction does not apply to additional frame components between thehead tube and the handlebar stem which, on 1 January 2021, are/were already at the
production stage.
Manufacturers are free to adjust the positioning of the boxes provided that the frame
geometry respects all articles of the technical regulations and the frame and forks are
entirely contained within the boxes and do not present any apparent dangers (protruding
parts or sharp angles).
The bicycle must be designed and adjusted in such a manner that the rider can adopt a
regulatory position as defined by Articles 1.3.022 and/or 1.3.023.

Figure 19: General illustration of the shape and positioning of the 8 cm boxes

24

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
A template formed by red boxes for each element is shown below. The points circled ingreen show the limits of the box lengths. The head tube box must be positioned in the sameaxis as the steerer tube.

Figure 20: Illustration of the template showing the start and finish points of the 8 cm boxes
for each element
The start and finish points of the 8 cm boxes are the following:•

Top tube: the front line of the box must pass through the point of intersection of therear line of the head tube box with the lower line of the top tube box; the rear lineof the box must pass through the point of intersection of the front line of the seattube box with the upper line of the top tube box.

•

Head tube: the upper line of the box must pass no more than 30 mm above thepoint of intersection of the rear line of the head tube box with the upper line of the
top tube; the lower line of the box must pass no more than 30 mm below the pointof intersection of the lower line of the down tube box with the rear line of the headtube box.

•

Down tube: the front line of the box must pass through the point of intersection of
the rear line of the head tube box with the upper line of the down tube box; the rearline of the box must pass through the point of intersection of the lower line of theseat tube box with the lower line of the down tube box.

•

Seat tube: the upper line of the seat tube must not surpass the upper line of the top
tube except in the situation where the seat post extends from the upper line of theseat tube; the lower line of the box must not be located in excess of 60 mm below
the bottom bracket center.

•

Seat stays: the upper line of the box must pass through the point of intersection of
the front line of the seat tube box with the front line of the seat stay box; the lower
line of the box must not be located in excess of 60 mm below the rear wheel axle
center.

25

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION•

Chain stays: the front line of the box must pass through the point of intersection of
the lower line of the seat tube box with the lower line of the chain stay box; the rearline of the box must not be located in excess of 60 mm behind the rear wheel axle
center.

•Forks: the upper line of the box must pass through the lowest point of the head
tube; the lower line of the box can be positioned at the desired height provided thatthe fork is completely contained within the box. The box of the down tube can beused to cover the upper part of the fork.

•

Seat post: the seat post must be attached at least with one point of contact with theseat tube and/or top tube in the highlighted area (green). The start of the area:
point of intersection of the upper line of the top tube with the rear line of the headtube box. The end of the area: point of intersection of the rear line of the seat staywith the rear line of the seat tube. The upper line of the box must pass at most 60
mm from the fixture of the saddle on the seat post. The front and rear lines of theseat post must not pass through any frame elements completely.

•

Additional frame component between the head tube and the handlebar stem: thelower line of the box must be collinear with the upper line of the head tube box; theupper line of the box can be positioned at the desired height provided that thecomponent is entirely contained within the box.

Figure 21: Illustration of the positioning of the seat post box
Any extension of the tube boxes beyond the points described above in order to containcertain frame parts is prohibited. For example, the extension of the top tube box behind theseat tube, as shown in Figure 22, is prohibited. The red zone of the frame is not allowed
under the regulations and the red part of the top tube box must not be used.
Cable guides and the seat bolt do not have to be contained within the 8 cm boxes provided
that there is no deviation from their principal function. If these parts are integrated into theframe, everything must fit inside the boxes.
26

27

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 22: Illustration of the unauthorized extension of the top tube box behind the seat tube

TUBE DIMENSIONS“The maximum height of the elements shall be 8 cm and the minimum thickness 1 cm. The
minimum thickness of the elements of the front fork shall be 1 cm; these may be straight or
curved (7) .”The terms "height" and "thickness" used in the article should be understood to be thelargest and smallest dimensions of tube sections respectively, i.e. the maximum andminimum dimensions authorized in any direction. Thus, the maximum dimension of thesection of elements is 8 cm while the minimum dimension is 1 cm.
A tolerance of one millimeter is allowed for frame elements to account for the thickness of
surface coatings (paint and sponsors’ logos). No tolerance is allowed when inspecting
technical designs, in particular during approval procedures.
The blue areas of the illustration below show the parts of the frame and forks that must
respect the rule of minimum and maximum dimension for the tubes.
All sections must be perpendicular to the front or upper edges (red lines in the drawings).

27

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 23: Illustrations of the areas of the frameset subject to the rule of minimum andmaximum dimension
Sections A to O on the illustration represent the limits of these areas and are defined asfollows:• Section A-A: a perpendicular section at the end of the top tube passing through thepoint 80 mm from the front line of the seat tube box on the lower line of the top tubebox.
• Section B-B: a perpendicular section at the end of the top tube passing through the point
160 mm from the front line of the head tube box on the lower line of the top tube box.
• Section C-C: a perpendicular section at the end of the down tube passing through thepoint 160 mm from the front line of the head tube box on the rear line of the down tubebox.
• Section D-D: a perpendicular section at the end of the down tube passing through thepoint 80 mm from the front line of the seat tube box on the rear line of the down tubebox.
28

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION• Section E-E: a perpendicular section at the end of the seat tube passing through thepoint 80 mm from the rear line of the down tube box on the front line of the seat tubebox.
• Section F-F: a perpendicular section at the end of the seat tube passing through thepoint 80 mm from the front line of the seat stay box on the rear line of the seat tube box.
• Section G-G: a perpendicular section at the end of the seat stays passing through thepoint 80 mm from the rear line of the seat tube box on the front line of the seat stay box.
• Section H-H: a perpendicular section at the end of the seat stays passing through thepoint of intersection of the front line of the seat stay box with the upper line of the chain
stay box.
• Section I-I: a perpendicular section at the end of the chain stays passing through thepoint of intersection of the front line of the seat stay box with the upper line of the chain
stay box.
• Section J-J: a perpendicular section of the chain stays passing through the point halfway
between the center of the bottom bracket and the rear wheel axle.
• Section K-K: a perpendicular section at the end of the fork blades located 50 mm fromthe point where the fork blades join together.
• Section L-L: a perpendicular section at the end of the fork blades located 50 mm fromthe front wheel axle.
• Section M-M (In case the seat post extends from the upper line of the seat tube): a
perpendicular section at the end of the seat tube on the part above the top tube passing
through the point 30 mm from the upper line of the top tube box on the front line of theseat tube box.
• Section N-N: a perpendicular section of the seat post passing through the point ofintersection of the upper line of the top tube or its extension with the front or the rearline of the seat post box.
• Section O-O: a perpendicular section of the seat post passing through the point 10mm
from the upper line of the seat post box on the front line of the seat post box.
The regulations do not concern the transition zones between tubes.
SLOPING TOP TUBE“The top tube may slope, provided that this element fits within a horizontal template definedby a maximum height of 16 cm.”
The top tube may be inclined (sloping) provided that this frame element is contained within
a horizontal box of 16 cm height. The limits of this zone are established as shown in the
diagrams below, i.e. upper limit by the intersection of the top tube with the head tube box
and lower limit by the intersection of the top tube with the seat tube box.

29

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 24: Illustration of maximum allowed sloping top tube

Figure 25: Lowest point (circled in green)that must be contained within the 16 cmhigh horizontal box

Figure 26: Highest point (circled in green)that must be contained within the 16 cmhigh horizontal box

In addition to the requirement to fit within the 16 cm-high horizontal box, the top tube mustalso fit within the 8 cm box.
INCLINATION OF SEAT STAYS
The front line of the 8 cm seat stay box must cross the area of intersection between thehorizontal 16 cm-high box and the 8 cm seat tube box. The rear wheel axle must be
contained within the seat stay and chain stay boxes.

30

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 27: Illustration of the rule on the inclination of seat stays
FORK GEOMETRY
When the fork comprises a steerer that is inserted inside the head tube, the fork is
considered as a separate component to the frame. Consequently, the fork must be
contained within a single box of 8 cm width (not including the steerer). This box starts at the
point of contact (circled in the Figure 28) between the head tube and the fork crown but is
not necessarily positioned in the same plane as the head tube.
When the fork is offset with the offset steerer component pivoting around its axis, it isconsidered to be integrated with the frame and thus the moving part is not consideredseparately from the structure of the frame. In this case the fixed and moving parts of theoffset fork arrangement must be wholly contained within the template for the head tube.
The axis of the head tube must always be contained within the head tube box in offset forks,
as illustrated in the Figure 29.
The body of the fork must be contained within a box although this can be offset in relation
to the head tube. This box starts at the point of contact (circled in the Figure 29) between
the head tube and the fork crown but is not necessarily positioned in the same plane as thehead tube. For safety reasons relating to the properties of composites, the templates of thehead tube and fork must overlap more than half the thickness of these boxes.
By no means can the boxes of the top tube or the down tube be used to cover a part of the
fork.

31

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 28: Illustration of the position of the boxes for a fork using a traditional internal
steerer

Figure 29: Illustration of the positioning of the axis of the head tube within the head tube box
32

33

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
Thus, forks considered separately from the frame must be able to be covered entirely by thefork box in the case of a standard design forks, or by the fork box and the head tube box in
the case of an offset forks. The box of the down tube can be used to cover the upper part of
the fork box. It is prohibited to use other frame boxes to cover the fork components.
A protuberance integrated with the fork crown, that serves as a stem or a support for thestem for the handlebars and handlebar extensions, is allowed but must be restricted to its
original function. A diversion of use in the form of an added extension is prohibited.

Figure 30: Illustration of the position of the boxes for offset fork

Figure 31: Illustration of a protuberance used as a stem.
33

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONMULTIPLE ELEMENTS
Multiple elements are authorized for the frame (top tube, down tube, seat tube, seat stays,
chain stays), the fork, the seat post.
The multiple tubes, taken individually and together, have to respect the maximum section
dimension of 8 cm and the minimum section dimension of 1 cm.

ARTICLE 1.3.022“In competitions other than those covered by article 1.3.023, only the traditional type ofhandlebars (see diagram «structure 1A») may be used. The handlebars must be positioned in
an area defined as follows: above, by the horizontal plane of the point of support of thesaddle (B); below, by the horizontal line plane passing 100 mm below the highest point of thetwo wheels (these being of equal diameter) (C); at the rear by the axis of the steerer tube (D)and at the front by a vertical line plane passing through at horizontal distance of 100 mm
from the axis of the front wheel spindle with a 5 cm tolerance (see diagram «Structure(1A)»). The distance referred to in point (A) is not applicable to the bicycle of a rider who
takes part in a sprint event on track (flying 200 m, flying lap, sprint, team sprint, keirin, 500
metres and 1 kilometre), but must not exceed 10 cm in relation to the vertical line passing
through the front wheel spindle.
In addition, all handlebars must conform to the following:
The maximum dimension of the cross section of the handlebars is 80 mm
The maximum dimension of the cross section of the stem is 80 mm
The minimum dimension of the cross section of all fork accessory is 10 mm
Two isosceles compensation triangles with two 40 mm sides are authorised at thejoints between the stem and the handlebars.”
The traditional type of handlebars must be used in road races, cyclo-cross and track races(apart from track time trials and pursuits). The attachment of any additional handlebar
component or fixed additional time trial extension handlebar is prohibited in these events.
In no case shall the front of the handlebars exceed the vertical plane passing at horizontal
distance of 100 mm from the the axis of the front wheel spindle; tolerance of 10 5 cm inrelation to a vertical line passing through the front wheel axle, which is the control zone of
the bicycle. The more forward the handlebar is positioned, the less maneuverable thebicycle will be and the less it will be easy to react quickly to an obstacle or a wind gust.
Moreover, this would result in moving the center of gravity of the rider on the bicycle, which
would increase even more the risks of loss of control. The area of positioning the handlebars
is defined by the diagram below:

34

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 32: Illustration of the box, marked out by lines A, B, C and D, within which thehandlebars must be fully contained.
“The brake controls attached to the handlebars shall consist of two supports with levers. It
must be possible to operate the brakes by pulling on the levers with the hands on the leversupports. Any extension to or reconfiguration of the supports to enable an alternative use isprohibited. A combined system of brake and gear controls is authorised.”
The bicycle must be fitted with a braking system that operates on both front and rear wheels
in order to take part in a road or cyclo-cross event.
Electronic derailleurs are authorised in competition provided that they are controlled solely
by the rider.
TRADITIONAL HANDLEBARS
The cockpit which comprises the handlebar and the stem must be able to fit entirely within
the template formed by 5 rectangular boxes of 80 mm width and the compensation triangles
as shown by the diagram below.
A template formed by red boxes for each element is shown below.

35

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 33 Illustrations (Example 1), (Example 2) of templates formed by red boxes for eachelement
36

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONThe start and finish points of the boxes are the following:•

Handlebars (1) and Handlebars (4): The upper line of the box is limited by a verticalplane passing at a horizontal distance of 100 mm from the axis of the front wheel
spindle; the lower line of the box is limited by the axis of the steerer tube.

•

Handlebars (2): The rear line of the box must pass through the point of intersectionof the front line of the Stem (5) box with the lower or upper line of the Handlebar (2)box; the front line of the box must pass through the point of intersection of the rearline of the Handlebars (1) box with the upper or lower line of the Handlebar box (2).

•Handlebars (3): The rear line of the box must pass through the point of intersectionof the front line of the Handlebars (4) box with the upper or lower line of theHandlebars (3) box; the front line of the box must pass through the point ofintersection of the rear line of the Stem (5) box with the lower or upper line of theHandlebars (3) box.

•

Stem (5): The upper line of the box can be positioned at the desired length provided
that it meets the prevailing quality and safety standards for bicycles; the lower lineof the box is limited by the dimensional restrictions of the frame components
between the head tube and the handlebars stem box (see Article 1.3.020).
Manufacturers are free to adjust the positioning of the boxes provided that the equipment
geometry respects all articles of the technical regulations and the equipment is entirelycontained within the boxes and does not present any apparent dangers (protruding parts or
sharp angles).
Any extension of the element boxes beyond the points described above in order to containcertain parts is prohibited.
TRADITIONAL HANDLEBARS, ELEMENT DIMENSIONSThe terms “maximum/minimum dimension of the cross section” used in the article should
be understood to be the largest and smallest dimensions of element sections respectively,
i.e. the maximum and minimum dimensions authorized in any direction.
A tolerance of one millimeter is allowed for the elements to account for the thickness of
surface coatings (paint and sponsors’ logos). No tolerance is allowed when inspecting
technical designs.
The blue areas of the illustration below show the parts must respect the requirement ofminimum and maximum dimensions.
Sections A-A, B-B, C-C, D-D, F-F and E-E must be perpendicular to the red lines in thedrawings.

37

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 34 Illustration of minimum and maximum dimensions requirements
Sections A to H on the illustration represent the limits of these areas and are defined asfollows:• Section A-A: a perpendicular section passing through the point 20 mm from theupper line of the Handlebars (1) box.
• Section B-B: a perpendicular section passing through the point 20 mm from thelower line of the Handlebars (1) box.
• Section C-C: a perpendicular section passing through the point 40 mm from the frontline of the Stem (5) box on the lower line of the Handlebars (2) box.
• Section D-D: a perpendicular section passing through the point 20 mm from theupper line of the Handlebars (4) box.
• Section E-E: a perpendicular section passing through the point 40 mm from the rearline of the Stem (5) box on the lower line of the Handlebar (3) box.
• Section F-F: a perpendicular section passing through the point 20 mm from thelower line of the Stem (5) box.
• Section G-G: a perpendicular section to the center line, passing through the point 40
mm from the lower line of the Handlebars (3) box on the rear line of the Stem (5)box.
• Section H-H: a perpendicular section to the center line, passing through the point 20
mm from the lower line of the Stem (5) box.
The regulations do not concern the transition zones between elements.

38

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONMULTIPLE ELEMENTS
Multiple elements are authorized for the stem, the traditional handlebars and base bars.
Individual tubes and the multiple tubes have to respect the maximum section dimension of
80 mm and the minimum section dimension of 10 mm, as well as respecting the 3:1 rule.
The multiple elements rule applies in the same areas than the rule of the minimum andmaximum dimension for the tubes. The diagrams below illustrate double tubes that comply
with the regulations.
In the case of the traditional handlebars and sections A-A, B-B, D-D and E-E, if one of thesections comprises multiple elements (not greater than 2), each element taken individually
have to respect the maximum and minimum dimensions authorised in any direction. The
requirement for the elements to respect the maximum and minimum dimensions in any
direction in conjunction is not required.

Figure 35: Example of a compliant section of an element formed by two tubes
In the event of a multiple elements of a length shorter than 8 cm, the same conditions as forother multiple elements apply with the exception that only one tube must respect theminimum section dimension of 1 cm. This scenario is limited to one exception per element.
TRADITIONAL HANDLEBARS, APPROVAL PROCEDURE, AS FROM 1.1.2023
This procedure does not apply to traditional handlebars which, on 1 January 2023, are:•already manufactured•

on the market•

already at the production stage

Handlebars/extensions/base bars that have already been available on the market during2021 and 2022 can be approved under the present procedure at the manufacturer’s request.

ARTICLE 1.3.023“For road time trials and for individual pursuit, team pursuit and Kilometre/500m time trial
on the track, a fixed additional time trial extension handlebar (consisting of 2 extensions withsections for each hand to hold and two elbowrests forearm supports) may be added or
39

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

integrated to either the traditional handlebar or the base bar steering system (see diagram«Structure (1B)»). If both sections are joined by part, the dimensional limit of this part isincreased to 1.5 times the value on the horizontal axis, for a maximum of 6cm.
The traditional type of handlebars or the base bar must be positioned in the area defined inarticle 1.3.022 (A, B, C, D).
The default horizontal distance between the vertical planes line passing through the bottom
bracket axle and the extremity of the fixed time trial extension handlebar, including controls
or fixed levers, may not exceed 750 mm, with the other limits set in article 1.3.022 (B, C, D)
remaining unchanged.
The default height difference between the midpoint of the forearm support and the highest
or lowest point of the extension (including accessory) must be less than 100 mm.
For road time trial competitions, controls or levers fixed to the handlebar extensions may notextend beyond the 75 cm limit.
For the track and road competitions covered by the first paragraph, the default distance of
750 mm may be increased to 850 mm to the extent that this is required for morphologicalreasons; «morphological reasons» should be taken as meaning anything regarding the sizeor length of the rider's body parts as a part of an exemption based on three (3) rider heightcategories mentioned below.

Category 1:

Less than 180.0 cm tall

For riders less than 180.0 cm tall, the horizontal distance between the vertical planes passing
through the bottom bracket axle and the extremity of the fixed time trial extension
handlebar, including all accessories, may be a maximum of 800 mm.
The height difference between the midpoint of the forearm support and the highest or lowest
point of the extension (including accessory) must be less than 100 mm.
Category 2:

Between 180.0 cm and 189.9 cm tall

For riders between 180.0 cm and 189.9 cm tall, the horizontal distance between the verticalplanes passing through the bottom bracket axle and the extremity of the fixed time trial
extension handlebar, including all accessories, may be a maximum of 830 mm.
The height difference between the midpoint of the forearm support and the highest or lowest
point of the extension (including accessory) must be less than 120 mm.
Riders in Category 2 must submit a rider height attestation application form available fromthe UCI website.
Category 3:

190.0 cm and taller

For riders 190.0 cm and taller, the horizontal distance between the vertical lines planes
passing through the bottom bracket axle and the extremity of the fixed time trial extension
handlebar, including all accessories, may be extended to a maximum of 850 mm.

40CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

The height difference between the midpoint of the forearm support and the highest or lowest
point of the extension (including accessory) must be less than 140 mm.
Riders in Category 3 must submit a rider height attestation application form available fromthe UCI website.
A rider who considers that he needs to make use of a distance between 75 and 80 cm makes
use of a rider height category exemption, must inform the commissaires' panel at the time of
the bike check. For clarity, the default distances mentioned above will be applied by thecommissaires panel if the respective height category exemption is not communicated by therider.
Only one exemption for morphological reasons may be requested; either the handlebar
extension can be moved forward or the peak of the saddle can be moved forward, in
accordance with Article 1.3.013.
In addition, all fixed time trial extension handlebars and elbow rest assemblies forearm
supports must conform to the following :Elbow rests Forearm supports must be made up of two parts (one part for each
forearm) and are only allowed if extensions are added ;The maximum width of each elbow rest forearm support is 125 mm ;The maximum length of each elbow rest forearm support is 125 mm ;The minimum length of each forearm support is 60 mm ;The maximum height of each forearm support is 85 mm ;The maximum inclination of each elbow rest forearm support (measured on the
support surface of the arm) is 15 degrees ;The maximum dimension of the cross section of each extension is 4cm 50 mm ;If both sections of the fixed time trial extension handlebar are joined by part, thedimensional limit maximum dimension of the cross section of this part permitted is increased
to 1.5 times the value on the horizontal axis, for a maximum of 6cm 80 mm ;The height difference between the elbow support point (midpoint of the elbowrest)
and the highest or lowest point of the extension (including accessory) must be less than
10cm.
The maximum dimension of the cross section of each mounting accessory is 80 mm;
For integrated equipment, an isosceles compensation triangle of 40 mm sides is
authorised at the joint between each extension and the mounting accessory.
Two isosceles compensation triangles of 40 mm sides are authorised at the joints
between the stem and the base bar;
The maximum dimension of the cross section of the base bar is 80 mm;
The minimum dimension of the cross section of all fork accessory is 10 mm;
The maximum dimension of the cross section of the stem is 80 mm;

41CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONBASE BAR
The cockpit which comprises the base bar and the stem must be able to fit entirely within
the template formed by 5 rectangular boxes of 80 mm width and the compensation triangles
as shown by the diagram below.
A template formed by red boxes for each element is shown below.

42

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 36 Illustrations (Example 1), (Example 2) of templates formed by red boxes for eachelement
The start and finish points of the boxes are the following:•

Base bar (1) and Base bar (4): The upper line of the box is limited by a vertical planepassing at a horizontal distance of 100 mm from the axis of the front wheel spindle;
the lower line of the box is limited by the axis of the steerer tube.

43

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION•••

Base bar (2): The rear line of the box must pass through the point of intersection of
the front line of the Stem (5) box with the lower or upper line of the Base bar (2)box; the front line of the box must pass through the point of intersection of the rearline of the Base bar (1) box with the upper or lower line of the Base bar box (2).
Base bar (3): The rear line of the box must pass through the point of intersection of
the front line of the Base bar (4) box with the upper or lower line of the Base bar (3)box; the front line of the box must pass through the point of intersection of the rearline of the Stem (5) box with the lower or upper line of the Base bar (3) box.
Stem (5): The upper line of the box can be positioned at the desired length provided
that it meets the prevailing quality and safety standards for bicycles; the lower lineof the box is limited by the dimensional restrictions of the frame components
between the head tube and the handlebars stem box (see Article 1.3.020).

Manufacturers are free to adjust the positioning of the boxes provided that the equipment
geometry respects all articles of the technical regulations and the equipment is entirelycontained within the boxes and does not present any apparent dangers (protruding parts or
sharp angles).
Any extension of the element boxes beyond the points described above in order to containcertain parts is prohibited.
BASE BAR, ELEMENT DIMENSIONSThe terms “maximum/minimum dimension of the cross section” used in the article should
be understood to be the largest and smallest dimensions of element sections respectively,
i.e. the maximum and minimum dimensions authorized in any direction.
A tolerance of one millimeter is allowed for the elements to account for the thickness of
surface coatings (paint and sponsors’ logos). No tolerance is allowed when inspecting
technical designs.
The blue areas of the illustration below show the parts must respect the requirement ofminimum and maximum dimensions.
Sections A-A, B-B, C-C and D-D must be perpendicular to the red lines in the drawings.

44

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 37 Illustration of minimum and maximum dimensions requirements
Sections A to F on the illustration represent the limits of these areas and are defined asfollows:•
Section A-A: a perpendicular section passing through the point 20 mm from theupper line of the Base bar (1) box.
•
Section B-B: a perpendicular section passing through the point 40 mm from the frontline of the Stem (5) box on the lower line of the Base bar (2) box.
•
Section C-C: a perpendicular section passing through the point 40 mm from the rearline of the Stem (5) box on the lower line of the Base bar (3) box.
•
Section D-D: a perpendicular section passing through the point 20 mm from theupper line of the Base bar (4) box.
•
Section E-E: a perpendicular section to the center line, passing through the point 40
mm from the lower line of the Base bar (3) box on the rear line of the Stem (5) box.
•
Section F-F: a perpendicular section to the center line, passing through the point 20
mm from the lower line of the Stem (5) box.
The regulations do not concern the transition zones between elements.
FIXED ADDITIONAL TIME TRIAL EXTENSION HANDLEBAR
The maximum inclination of each forearm support should be measured in relation to thereference plane. The regulation regarding the 15 degrees as well as the 125mm and 50mm 4cm aim to avoid any fairing by using large extensions or a too big inclination.

45

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

The article must be understood so that the extension can be of a 50mm 4 cm maximal
section (width and height). On this extension, one part, the “forearm support elbow rest”
can be wider than 50mm 4 cm and can go up to 125mm wide (projected surface). This partcan be of a 125mm maximal length.
The extensions, mounting and any other accessories (controls, levers, etc.) must be able tofit entirely within the template formed by 6 rectangular boxes and the compensation
triangles as shown by the diagram below.
A template formed by red boxes for each element is shown below.

Figure 38 Illustrations (A), (B) of templates formed by red boxes for each element46

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 39 Illustration (C) of templates formed by red boxes for each element
The start and finish points of the boxes are the following:•

Extension (1): The front line of the box can be positioned at the desired length
provided that the extremity of the extension is completely contained within the box;
the rear line of the box must pass through the point of intersection of the front or
upper or lower line of the Extension (2) box with the lower or the upper line of the
Extension (1) box.

•

Extension (2): The front line of the box must pass through the point of intersectionof the upper or lower line of the Extension (1) box with the front line of the
Extension (2) box. The rear line of the box must pass through the point ofintersection of the front line of the Extension (3) box with the lower or upper line of
the Extension (2) box.
Extension (3): The front line of the box must pass through the point of intersectionof the rear line of the Extension (2) box with the lower or upper line of the Extension(3) box. The rear line can be positioned at the desired length provided that the rear
extremity of the extension is completely contained within the box.

•

In the case when both extensions are joined by part, the Extension (3) box must
accommodate the joined part and therefore the cross section can be enlarged to
80mm.
•

Mounting accessory (4): the upper line of the box must pass through the point ofintersection of the rear or front line of the Mounting accessory box with the lower
line of the Extension (3) box; the lower line of the box must pass at most 15 mmfrom the fixture of the mounting accessory on the handlebars or the base bar.

47

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

An additional Mounting accessory box (6) of 125mm length may be added in between the
Extension (3) box and the Forearm support box (5). The position of the box may vary but
never cross the area defined by the vertical planes passing through the extremity point of
the front line of the Forearm support box (5) and the rear line of the Extension (3) box.
The maximum/minimum dimension of the cross section cannot exceed the section view
length to width of 125mm x 50mm or 80mm (in case sections of extensions are joined bypart). The box must be used solely for the adjustment and/or fixation purposes of the
Forearm support box. The use of the box for any other reason is forbidden.
•

Forearm support (5):Each forearm support must be able to fit entirely within its own rectangular box (5) of
85 mm width. The box may overlap the Extension (3) box or the additional Mounting
accessory box (6).
The front line of the Forearm support box must be positioned at a minimum distanceequal to 180 mm or greater, from the vertical plane passing through the extremity ofthe extension.
The minimum length of forearm supports is limited to 60 mm.

Figure 40 Illustration of the Forearm support box position
Manufacturers are free to adjust the positioning of the boxes provided that the equipment
geometry respects all articles of the technical regulations and the equipment is entirelycontained within the boxes and does not present any apparent dangers (protruding parts or
sharp angles).
Any extension of the element boxes beyond the points described above in order to containcertain parts is prohibited.
FIXED ADDITIONAL TIME TRIAL EXTENSION HANDLEBAR, ELEMENT DIMENSIONSThe terms “maximum/minimum dimension of the cross section” used in the article should
be understood to be the largest and smallest dimensions of element sections respectively,
i.e. the maximum and minimum dimensions authorized in any direction.
A tolerance of one millimeter is allowed for the elements to account for the thickness of
surface coatings (paint and sponsors’ logos). No tolerance is allowed when inspecting
technical designs.
The blue areas of the illustration below show the parts must respect the requirement ofminimum and maximum dimensions.
48

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Sections A-A and B-B must be perpendicular to the red lines in the drawings.

Figure 41 Illustration of minimum and maximum dimensions requirements
Sections A to D on the illustration represent the limits of these areas and are defined asfollows:•
Section A-A: a perpendicular section passing through the point 20 mm from thefront line of the Extension box (1).
•Section B-B: a perpendicular section passing through the point 40 mm from the frontline of the Mounting accessory box on the lower line of the Extension box (3).
•Section C-C: a horizontal section passing through the point 40 mm from the lower
line of the Extension box (3) on the front line of the Mounting accessory box.
•
Section D-D: a horizontal section passing through the point 20 mm from the lower
line of the Mounting accessory box.
The regulations do not concern the transition zones between elements.
MULTIPLE ELEMENTS
Multiple elements are authorized for the stem and base bars.
Individual tubes and the multiple tubes have to respect the maximum section dimension of
80 mm and the minimum section dimension of 10 mm, as well as respecting the 3:1 rule.
The multiple elements rule applies in the same areas than the rule of the minimum andmaximum dimension for the tubes. The diagrams below illustrate double tubes that comply
with the regulations.

49

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 42: Example of a compliant section of an element formed by two tubes
In the event of a multiple elements of a length shorter than 8 cm, the same conditions as forother multiple elements apply with the exception that only one tube must respect theminimum section dimension of 1 cm. This scenario is limited to one exception per element.

FIXED ADDITIONAL TIME TRIAL EXTENSION HANDLEBAR JOINED BY PARTIn case when both extensions are joined by part, the maximum dimension of the crosssection of the joined part is 80mm dimensional limit of the joined part is increased to 1.5
times the value on the horizontal axis is 6cm. Other dimensional restrictions remainunchanged.

50

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 43 Illustration of extensions joined by part
The joined part should be understood as the piece of the extensions has enlarging properties
only in Y and Z axes where Y-axis is parallel to the direction of the movement and should
comply with joined by part dimension restrictions.
Any piece of extensions that are enlarging properties in the direction of the X-axis should
comply with dimensional restrictions for extension bars.
BINDING ELEMENT
Any binding element (bridge) between the fixed additional time trial extension handlebar,
elbow rest forearm supports is considered as the continuation of the the fixed additionaltime trial extension handlebar. Therefore, the maximum dimension of the cross section of
the binding element must be 50 mm as well as the 3:1 rule must be respected. Any binding
element between stack/raisers spacers must follow the identical restrictions. The binding
element must be positioned at the horizontal distance equal to 80 mm or greater, from thevertical plane passing through the extremity of the handlebars extensions.

51

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Multiple binding elements are forbidden. Only one binding element can be placed in thementioned areas.
BINDING ELEMENT, ELEMENT DIMENSIONS
Sections A to B in the illustration below represent the limits of these areas and are defined
as follows:•

Section A-A: a perpendicular section passing through the point 5 mm from theextension on the upper line of the binding element.

•

Section B-B: a perpendicular section passing through the point 5 mm from theextension on the upper line of the binding element.

The regulations do not concern the transition zones between elements.

Figure 44: Illustration of the binding element
Having the handlebar taped or molded on the complete length is authorized as long as theconditions mentioned above are respected. The position of the elbow rest is not controlled
and it is possible to have it integrated in the extension.
The handlebar extensions with all their accessories (controls, levers, etc. and all theirmounting accessories) must be included within the maximum distance allowed from thebottom bracket axle. Any moving parts have to be placed in the most horizontal position
that can remain unsupported through their range of movement.
To check, rotate the levers to the position that gives the maximum horizontal length andallow to rest, and then take the measurement allowed from the bottom bracket axle.

SITUATION AROUND THE HEIGHT DIFFERENCE BETWEEN THE FOREARM SUPPORT POINT
AND THE HIGHEST OR LOWEST POINT OF THE HANDLEBARS EXTENSION
The fixed additional time trial extension handlebar plus any accessories (controls, levers, etc.
and all their mounting accessories) must be within ± 100 or ±120 or ±140 mm (as perprovisions of article 1.3.023) with a tolerance of 5mm from the level defined by the middle
52

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONof the elbow/forearm supports. Forearm supports Elbow rest pads must not be consideredduring the measurement. Any moving parts have to be placed in the most vertical position
that can remain unsupported through their range of movement.
To check, rotate the levers to the highest point and allow to rest, and then take themeasurement for the +100/+120/+140 mm (as per provisions of article 1.3.023) position. If
necessary, rotate the lever to the lowest point and take the measurement for the -100/120/-140 mm (as per provisions of article 1.3.023) position. The measurements of the upperand lower limits are taken in the front half of the fixed additional time trial extension
handlebar.
The measurement is made from a horizontal perspective of the forearm elbow support. If it
is inclined, the measurement will be made from the middle of the elbow support.

Figure 45 Examples of the vertical limits per each height category (as per provisions of article
1.3.023)

Figure 46: Points of measurement for the vertical limits of the fixed additional time trial
extensions and any accessories

53

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 47 Illustration of the maximum inclination of each elbow rest
Having the fixed additional time trial extension handlebar taped or molded on the complete
length is authorised as long as the conditions mentioned above are respected. The positionof the elbow rest forearm support is not controlled and it is possible to have it integrated in
the extension.
The fixed additional time trial extension handlebar with all their accessories (controls, levers,etc. and all their mounting accessories) must be included within the maximum distanceallowed from the bottom bracket axle. Any moving parts have to be placed in the mosthorizontal position that can remain unsupported through their range of movement.
To check, rotate the levers to the position that gives the maximum horizontal length andallow to rest, and then take the measurement allowed from the bottom bracket axle.

Figure 48 Points of measurement for the horizontal distance from the bottom bracket axle

54

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONSITUATION AROUND POSITION FOR TRACK, ROAD AND CYCLO-CROSS EVENTS
There are four different positions for track events:•

For sprint track events (sprint, team sprint, keirin, flying 200 m, flying lap), road andcyclo-cross (mass events): the position with the saddle withdrawn at least 50 mm behinda vertical plane passing through the center the bottom bracket and a maximum
advancement of the handlebars of 100 mm in front of the front wheel axle. An exemption
for morphological reasons is possible for riders who want to bring the tip of the saddle
forward up to the vertical plane passing through the center of the bottom bracket.

•

For endurance races (points race, elimination race, scratch race and madison): theposition is identical to that for road races and cyclo-cross events with the saddle
withdrawn at least 5 cm behind a vertical plane passing through the center the bottom
bracket and a maximum advancement of the handlebars of 5 cm in front of the front
wheel axle. An exemption for morphological reasons is possible for riders who want tobring the tip of the saddle forward up to the vertical plane passing through the center ofthe bottom bracket.

•

For track pursuit events (individual pursuit, team pursuit) and road individual events(ITT, TTT and the Mixed Team Relay): the position is identical to that for road time trials
with the saddle withdrawn at least 50 mm behind a vertical plane passing through thecenter of the bottom bracket and an advanced position for handlebars extensions of a
maximum of 750 mm in front of the center of the bottom bracket. An exemption formorphological reasons is possible for riders who want to bring the tip of the saddle
forward up to the vertical plane passing through the center of the bottom bracket.
Furthermore, an exemption for morphological reasons is possible for riders who want toadvance the handlebars extension to up to 800/830/850 mm in front of the center of thebottom bracket. Only one exemption for morphological reasons is allowed per rider.

•

For time trials (500 m or 1 km): the position with the saddle withdrawn at least 50
mm behind a vertical plane passing through the center the bottom bracket and amaximum advancement of the handlebars of 100 mm in front of the front wheel axle. Incase of using handlebars extensions, an advanced position of a maximum of 750 mm infront of the center of the bottom bracket. An exemption for morphological reasons is
possible for riders who want to bring the tip of the saddle forward up to the verticalplane passing through the center of the bottom bracket. Furthermore, an exemption formorphological reasons is possible for riders who want to advance the handlebars
extension to up to 800/830/850 mm in front of the center of the bottom bracket. Only
one exemption for morphological reasons is allowed per rider.

• The chart below offers a summary of authorised positions.

55CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Handlebar - Type

Discipline

Event

Road / Cyclo-crossMass events

SaddleHandlebar

SprintTeam Sprint
Sprint – Flying Lap

100 mm max

KeirinTraditional Handlebars
Points Race
Track

Elimination Race
Scratch----------------------------

Madison
500m / 1km-50 mm max or 0
(in case of exemption)

Individual /Team Pursuit

750 mm max or 800
mm max / 100 mm
vertical limit(in case of
exemption)
OR
830 mm max / 120
mm vertical limit

ITT / TTT /(in case the height of
the rider is 180-189,9cm tall)

Mixed Time TrialOR

Extensions
Road

850 mm max / 140
mm vertical limit(in case the height of
the rider is 190 cm
tall or taller)

Figure 49: Authorised positions for saddle and handlebars/handlebars extensions
HANDLEBARS EXTENSIONS / BASE BARS, APPROVAL PROCEDURE, AS FROM 1.1.2023
This procedure does not apply to handlebars extensions / base bars which, on 1 January2023, are:•already manufactured•

on the market•

already at the production stage

Handlebars/extensions/base bars that have already been available on the market during2021 and 2022 can be approved under the present procedure at the manufacturer’s request.

56

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONARTICLE 1.3.024“Any device, added or blended into the structure, that is destined to decrease, or which has
the effect of decreasing, resistance to air penetration or artificially to accelerate propulsion,
such as a protective screen, fuselage form fairing or the like, shall be prohibited.”
Protective screens, fuselages, fairings or any other device that is added or blended into thestructure, and that is destined or have the effect of reducing resistance to air penetration,
are prohibited. Aerodynamic assemblies and protuberances on the head tube or elsewhereare prohibited.
PROTECTIVE SCREEN“A protective screen shall be defined as a fixed component that serves as a windscreen or
windbreak designed to protect another fixed element of the bicycle in order to reduce its
wind resistance.”
A protective screen, shown by the diagram below, is defined as a fixed element acting as acover, screen or windbreak designed to protect another component of the bicycle in orderto reduce its wind resistance. This device is prohibited in competition.

Figure 50: Illustration of a protective screen
A cover is authorized insofar as it ensures only the cover of an object without artifices in its
shape, its content and its volume. These covers must in no case constitute an excrescence.
Moreover, all together with equipment, it must then comply with all UCI rules specified toeach piece of equipment.

57

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 51: Illustrations of authorized covers
The image below illustrates non-compliance – a cover added to the frame to conceal brake
cables.

Figure 52: Cover added to frame to conceal brake cables
The addition of a cover to a braking system, as shown in the image below, is authorized. The
unit is considered to be integrated with the frame or fork.

58

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 53: Brake integrated with the fork and fitted with a cover
The combination of the frame tube (or fork tube) + brake components + cover must respect
the minimum and maximum dimension rules and must be contained completely (Rim Brake
system) or partially (Disc Brake system) within the corresponding 80 mm box.
What is the “corresponding 80 mm box”?
• Rim Brake system: For rear brakes, attached to the seat stays/chain stays, thecombination of the seat stay/chain stay tube + brake + cover must fit inside the 80 mm boxof the seat stays / chain stays.
Disc Brake system: For the rear disc brake components, attached to the seat stays and/or
chain stays, the combination of the seat stay and/or chain stay + cover must fit inside the 80
mm box of the seat stays and/or chain stays.
•

There are two three scenarios for front brakes :- Rim Brake system: For a standard fork (steerer tube inserted inside the head tubeof the frame), if the cover does not extend to the stem, then the combination of thefork + brake + cover must fit inside the 80 mm box of the fork.

59

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 54: Illustration of a cover that fits over the brake only
- Rim Brake system: For an offset fork, or a standard fork with a cover over the brake that
extends to the stem, then the combination of the fork + brake + cover must fit inside the 8
cm boxes of the fork and frame head tube.

Figure 55: Illustration of a cover that fits over the brake and extends to the stem
With regards to covers over brakes, it is important to distinguish between the two different
types of brake and the corresponding scenarios that apply :- Brakes considered to be “standard”: these are available on general sale and their shapeand system of attachment allow them to be used on all types of frames and forks. These
brakes, solely when a cover is fitted, must be contained within the corresponding 8 cm box,
and are taken into consideration in the measurement of minimum/maximum dimensions.
- Brakes considered to be “integrated”, which are designed for a specific model offrame/fork and which can only be used with this frame/fork due to their shape or60

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

attachment system. These brakes, whether a cover is fitted or not, must in all cases becontained within the corresponding 8 cm box and are taken into consideration in themeasurement of minimum/maximum dimensions.
It should be noted that brake systems that are integrated or use a cover must be submitted
to the UCI during the approval procedure for frames and forks, and in any case before use incompetition.
FUSELAGE“A fuselage form shall be defined as an extension or streamlining of a section. This shall betolerated as long as the ratio between the length L and the diameter D does not exceed
established dimensional requirements as defined in articles 1.3.020 (framesets), 1.3.022 and
1.3.023 (handlebars, base bars and fixed time trial extension) 3. This rule does not apply toframe and fork of the bicycle.”
The 3:1 rule applies to fuselage forms and is applicable to all elements of the bicycle which
are frameset accessories (handlebars, handlebar extension, stem, elbow rests and handlebar
extension risers) with the exception of The rule does not apply to moving parts (wheels andchainset), front and rear derailleur bodies, braking systems for wheels, saddle and pedals.
For frameset accessories that are subject to the 3:1 rule, the minimum section dimension is
10 mm (in any direction). Cranks are not subject to the 3:1 rule, but their The width of cranks
is restricted to 80 mm.
The 3:1 ratio acts as a regulatory factor.
The smallest section dimension possible is 1cm (in any direction) for the frame and fork
accessories subject to the 3:1 rule. Here are some examples:•for the use of the maximum height authorized for an element, namely 8 cm, theminimum thickness is 8/3 = 2.667 cm;•

for the use of the minimum thickness authorized for an element, namely 1 cm, themaximum height is 1 x 3 = 3 cm;•

for all intermediate options, the height to thickness ratio must not exceed 3.

The terms "height" and "thickness" should be understood to be the largest and smallest
section dimensions of the tubes respectively, i.e. the maximum and minimum dimensions
authorized in any direction.
However, tThe regulation on the subject of fuselage form (3:1 ratio) does not exempt
manufacturers from complying with the prevailing official safety standards concerning
uncovered projections (must be rounded for safety), where
As for brake levers, derailleur controls, bottle cages and other items not subject to the 3:1
rule, "knife profile" shapes are not allowed.

61

62

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 56: Illustration of the restriction around the fuselage form of elements
For elements subject to the 3:1 rule, a tolerance of one millimeter is allowed when carryingout checks at events to account for the thickness of surface coatings (paint and sponsors’
logos).
The addition of tape to modify the section of any equipment that is subject to the 3:1 rule tobring it into compliance is prohibited.

Sections
The 3:1 rule must be applied to all sections that are perpendicular/normal to the generalshape of the element.

Figure 57: Illustration of the 3:1 rule application

62

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
Molded elements
In case elements are molded together, the principle of a tangential line to an inclination
point of the stem contour lines will be applied.
If the stem is molded into the handlebar in a way that surpasses the general shape of thehandlebar, in the front and in the back:Tangential lines with points of intersections will define the shape of the stem.

If the stem is molded into the handlebar in a way that surpasses the general shape of thehandlebar, in the back:
The intersection of tangential lines with the front contour line of the handlebar will define
the shape of the stem.

If the stem is molded into the handlebar in a way that surpasses the general shape of thehandlebar, in the front:
The intersection of tangential lines with the back contour line of the handlebar will define
the shape of the stem.

63

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 58: Examples of a stem definition in case when it is molded together with a handlebar
FAIRING“A fairing shall be defined as the use or adaptation of a component of the bicycle in such afashion that it encloses a moving part of the bicycle such as the wheels or the chainset.
Therefore it should be possible to pass a rigid card (like a credit card) between the fixed
structure and the moving part.”
If the seat tube mirrors the curve of the wheel it must not enclose it. It must be possible toinsert a credit card freely and without bending between the tube and the wheel as shown by
the illustrations below.

Figure 59: Illustration of wheel fairing

64

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 60: Insertion of a credit card between the wheel and frame to check that a fairing is
not present
Similarly, the addition of a fairing to cover chainwheels, chains or any other moving part ofthe bicycle is prohibited.

ARTICLE 1.3.024 BIS
BOTTLES“Bottles shall not be integrated to the frame and may only be located on the down and seattubes on the inside of the frame. The dimensions of the cross sections of a bottle used incompetition must not exceed 10 cm or be less than 4 cm and their capacity must be aminimum of 400 ml and a maximum of 800 ml.”
The last few years, bBottles were increasingly moving away from their original function ofallowing riders to rehydrate towards an alternative use as aerodynamic elements which areintegrated into the design of frames in order to improve riders' performances. It is became
essential to regulate the positioning and dimensions of bottles in order to avoid any
deviations and to return bottles to their principal function.
Article 1.3.024 bis has come into effect on 1 January 2013. Since that date, bBottles are only
allowed to be positioned on the down tube and seat tube inside of the main triangle of aframeset. It is possible to use a bottle of each of these tubes, but the bottle cannot be
positioned at the same time to the two tubes. Locating bottles behind the saddle, on thestem, or in any other position is then prohibited. Furthermore, it is not allowed to integratebottles with frames, meaning that there must be a physical and/or visual space between thebottle and the tube to which it is attached. Similarly to the rule on the wheel fairing, itshould be possible to pass a rigid card (like a credit card) between the bottle and the tube towhich it is attached.

65

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 61 Illustration of a physical (left) and a visual (right) space between the bottle and thetube to which it is attached.
The rule specifies the bottle dimensions in order to avoid empty bottles being added solely
for reasons of aerodynamics. The rule also improves the rider's ability to access and grasp
the bottle. It is forbidden to place an empty bottle (without any liquid) on the bicycle. The
bottle should be held safely to avoid the bottle to be ejected on rough roads.
The illustration below shows a bottle that complies with the current regulations withthickness of between 40 mm and 100 mm. The minimum dimension of 40 mm does not
apply to the bottle cap, the area where the cap is attached to the bottle (shown in blue) and
30 mm wide areas from the neck and base of the bottle. The dimensions are measured
perpendicular to the axis of the fluid exit direction (i.e. parallel to the cap threading
direction) along the length of the bottle.

66

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 62: Illustration of the areas of a bottle where the dimensions are subject toregulations
Finally, the capacity is also specified in order to guarantee that bottles are used forrehydration purposes and to prevent any deviations. If bottles with a volume in excess of
500 ml are used, it is recommended that the bottle attachment system should be checked toensure that it can bear a weight in excess of 0.5 kg.
BOTTLE CAGE
A bottle cage is an add-on accessory to the frame and it can be integrated into the frame
design. The bottle cage may only be located on the down tube or the seat tube on the insideof the frame. The bottle cage and the bottle must be able to fit entirely within a rectangularbox of 130 mm width. The 130 mm width of the box is measured perpendicular to the axis of
the fluid exit direction along the length of the bottle (i.e. parallel to the cap threading
direction), whilst being attached to the bottle cage.
The box may overlap the down tube and/or the seat tube.
67

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONThe bottle cage must be used solely for the secure fixation of the bottle. The use of thebottle cage for any other reason is forbidden. A tolerance of 5mm is allowed during the onsite checks.
It should be noted that bottle cages that are integrated must be submitted by amanufacturer to the UCI during the approval procedure for framesets, and in any casebefore use in competition.

Figure 63 Illustration of the positioning of the bottle cage boxes
CAMELBACK
Hydration is an essential physiological consideration for athletes during a physical effort.
Neither bottles nor camelback systems should diverge from their original function.
There is a significant risk of camelback systems or any similar devices being used for otherpurposes than their original function. For this reason certain restrictions apply if they are to
be used in competition:• The camelback system is authorized for competition solely for the purpose of rehydrating
the rider.
• It must not be the case that the system, presented as a way of improving a rider'shydration during an effort, is accompanied by an "aerodynamic clothing" advantage, inthis way deflecting the camelback system from its original function.
• The liquid container must not be capable of holding more than 0.5 liters and must not be
a rigid shape liable to be considered as a device for improving the rider’s aerodynamic
qualities.
• The use of the camelback system must not modify the rider's morphology and must thus
be directly attached against the body.
• The use of the camelback system is only allowed on the back of the rider.
68

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION• It is mandatory for all riders who want to use a camelback system to present it to thecommissaires before the start of the race at the risk of being disqualified.

Figure 64: Example of the use of a non-compliant camelback system

ARTICLE 1.3.024 QUARTER“The UCI may fit, or appoint its agents or commissaires to fit, onboard technology devices forthe purpose of detecting technological fraud during competition. Refusal by a team or rider
to comply with instructions to carry such onboard technology devices may lead to theimposition of disciplinary measures in accordance with article 1.3.003bis.”(article introduced on 15.02.19)

ARTICLE 1.3.025“Freewheels, multiple gears and brakes are not permitted for use on the track during
competition or training.
Disc brakes are allowed in cyclo-cross training and competition.
Disc brakes are allowed in mountain bike training and competition.
Disc brakes are allowed in road race and time trial training and competition.
Disc brakes are allowed in BMX training and competition.
Disc brakes are allowed in Trials training and competition.
For races on the road and cyclo-cross, the use of fixed sprocket is forbidden: a braking
system that acts on both wheels is required.”(text modified on 01.07.18)
With regard to the use of disc brakes in the road disciplines, for safety reasons, the discs
must imperatively be chamfered.
On the track, the transmission exclusively must consist of three distinct elements:•••a chaina chainring
a sprocket
69

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
No additional elements are authorized (the chain tensioner, a derailleur, etc.). For safety
reasons and in line with this constraint, chainrings and sprockets must be of a circular shape.

Section 3: riders’ clothing§ 1 General provisions
ARTICLE 1.3.026“When competing, all riders shall wear a jersey with sleeves and a pair of shorts, possiblyin the form of a one-piece skinsuit. By shorts it is understood that these are shorts thatcome above the knee.
Sleeveless jerseys shall be forbidden.
However, for downhill, four-cross and Enduro mountain bike events, BMX, trials andindoor cycling, specific provisions are laid down in the part of the regulations concerning
the discipline in question.”(text modified on 01.01.20)
By jersey with sleeves it is understand a jersey that leaves hands not covered. Consequently,
integrated gloves in a jersey or a skinsuit are prohibited.

ARTICLE 1.3.027“Jerseys shall be sufficiently distinct from world champions', UCI cup and classification
leaders' and national jerseys to avoid confusion.”

ARTICLE 1.3.028“Save in cases expressly provided for in the regulations, no distinctive jersey may be awarded
or worn.”

ARTICLE 1.3.029“No item of clothing may hide the lettering on the jersey or the rider's identification number,particularly in competition and at official ceremonies.”

ARTICLE 1.3.030“Rain jackets must be either transparent, the same colour as the team jersey or display
the team’s name or logo on their front and back. The minimum size of the inscription
shall be at least 20cm in height or width.”(text modified on 23.10.19)

ARTICLE 1.3.031
1. “Wearing a rigid safety helmet shall be mandatory during competitions and official
training sessions in the following disciplines in all disciplines except indoor cycling and BMX
70

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
Freestyle Flatland : track, mountain bike, cyclo-cross, trials and BMX Racing, BMX Freestyle,para-cycling, as well as during cycling for all events.
2. During competitions on the road, a rigid safety helmet shall be worn.
In all disciplines concerned During training on the road, the wearing of a rigid safety helmet
is recommended outside of competitions and official training sessions. In any case, legal
provisions must be complied with. However, riders must always comply with the legal
provisions in this regard.
3. Each rider shall be responsible for:ensuring that the helmet is approved in compliance with an official security standard
and that the helmet can be identified as approved;
wearing the helmet in accordance with the security regulations in order to ensure full
protection, including but not limited to a correct adjustment on the head as well as a correct
adjustment of the chin strap;
avoiding any manipulation which could compromise the protective characteristics ofthe helmet and not wearing a helmet which has been undergone manipulation or an incident
which might have compromised its protective characteristics;-

using only an approved helmet that has not suffered any accident or shock;using only a helmet that has not been altered or had any element added or removed
in terms of design or form;-

using only accessories approved by the helmet manufacturer.

4. For road and track disciplines, the dimensions of the helmet (including accessories) must
not exceed the below dimensions:
Length (L) can be less or equal to 450 mm ;Width (W) can be less or equal to 300 mm ;Height (H) can be less or equal to 210 mm ;It is prohibited to add a detachable cover to a helmet. The composition of the helmetmaterial and its surface condition are not subject to any regulations. However, additions to
71

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
the helmet are not allowed (cover, tape, etc.). The use of mechanical or electronic systems
in or on the helmet is also prohibited.
It is obligatory to wear a helmet for safety reasons and no modifications to the helmet areallowed. The helmet must be approved in accordance with the prevailing safety standards,
must not have been modified and must not have suffered an impact or been involved in an
accident.
Add-on helmet visors or covers are authorized provided that they are supplied by the helmet
manufacturer.
Compliance with the dimensional restrictions is not compulsory for helmets that on 1
January 2023, are:•already manufactured•

on the market•

already at the production stage

ARTICLE 1.3.032[abrogated].

ARTICLE 1.3.033“Items of clothing may not modify the morphology of the rider and any non-essential
element or device, of which the purpose is not exclusively that of clothing or protection, is
forbidden. This shall also apply regarding any material or substance applied onto the skin or
clothing and which is not itself an item of clothing.
Modifications to the surface roughness of clothing are authorized but may only be the resultof threading, weaving or assembling of the fabric. Surface roughness modifications shall belimited to a profile difference of 1mm at most.

The measure of surface roughness modification shall be made without pressure or traction
on the clothing.
All clothing must maintain the original texture of the textile and may not be adapted in amanner to integrate form constraints. Therefore, when not worn, clothing may in no casecontain any self-supporting element or rigid parts.”
Text modified on 04.03.19
Garments must not be adapted in any way such that they diverge from their use purely as
clothing. The addition of any non-essential element or device to clothing is prohibited. The
use of mechanical or electronic systems with clothing is prohibited.

72

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION
It is also prohibited to wear clothing or skinsuits to which non-essential elements have been
added with a view to improving their aerodynamic properties such as, for example, "wings"
under the arms or an extension between the helmet and the jersey or skinsuit. It is
obligatory for clothing to follow the cyclist's body shape.
Shoes that have been made more aerodynamic by the addition of a non-essential element orby a modification to the toe or heel are prohibited from competition. No part of the shoeshould extend above ankle height.
Gloves used in track competition must not be mittens that only have one, two or three
separations between the fingers. Gloves must not fully or partially restrain free movementsof fingers.

Figure 65: Example of a mitten forbidden in track competition

Figure 66: Example of forbidden product and equipment
Non-essential items forbidden by article 1.3.033 of the UCI Regulations shall include any
product or substance applied on the body (legs, arms, etc..) aimed at improving
aerodynamics. Specific oils for protection against cold or rain are tolerated.

73

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATION

Figure 67: Example of a substance applied on the body

ARTICLE 1.3.033 BIS“Socks and overshoes used in competition may not rise above the height defined byhalf the distance between the middle of the lateral malleolus and the middle of thefibula head.”
Article introduced on 15.10.18
In order to clarify the socks height regulation and have a fair height between riders, thefollowing height is now imposed.

Figure 68: Example of forbidden product and equipment

ARTICLE 1.3.034“During competitions, riders' attendants may not bear any advertising matter on theirclothing other than that authorized for their team's riders for the race in question.”74

CLARIFICATION GUIDE OF THE UCI TECHNICAL REGULATIONTRACKING MODIFICATIONS (HIGHLIGHTED IN RED)

VERSION

ARTICLE

01.01.2023

DEFINITIONS

01.01.2023

1.3.01201.01.2023

1.3.01301.01.2023

1.3.02001.01.2023

1.3.02201.01.2023

1.3.02301.01.2023

1.3.02401.01.2023

1.3.024 BIS

01.01.2023

1.3.03175